The law does not specify an amount that must be paid and the parents may decide between themselves as to how much maintenance ought to be paid.
However, such an agreement may be revised by the court which will take into consideration the income and expenses of each of the spouses so that proportionality may be applied. If necessary, the court – either at the instance of the judge or of the ‘Ministerio Fiscal’ (the latter is a legal officer of the court always present where children are involved in a divorce case).
Furthermore, should the circumstances of either parent change then any agreement or court order may be revisited such that the amount payable by the parent is increased or decreased accordingly. The maintenance sum will also vary according to the IPC or inflation rate.